<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<ul id="box">
    <li>aaa</li>
    <li>bbb</li>
    <li>ccc</li>
</ul>
<hr>
<ul id="box2">
</ul>
<hr>
<ul id="box3">
</ul>
<script>
    var box = document.getElementById('box');
    var box2 = document.getElementById('box2');
    var box3 = document.getElementById('box3');
    var willMove = box.children[0].cloneNode(true);
    box2.appendChild(willMove)
    box3.appendChild(willMove.cloneNode(true))
</script>
</body>
</html>